El hipopótamo

Get a close-up look at animals in the zoo, from appearance to behavior to babies. This series uses vivid photos to compare life in the wild and life in captivity in terms of habitat, activity, and diet.

This book introduces you to giraffes, including their size, diet and everyday behavior, which highlights differences between those in the wild and those living in a zoo habitat.

Can you find these in the book? robin, tulip. What is your favorite season? Books in the Seasons series explore seasonal changes from a child's point of view. Fin out about the sights, sounds, tastes, and smells that each season brings.

Hay dos cosas que son ciertas aquí, ahora y siempre. La primera es que la historia la oficial, la de mayúsculas reverenciales la escriben los ganadores. La segunda es que esa historia no soporta el sentido del humor ni las paradojas, es decir las verdades a secas. Basta con que brinque un dato ignorado por los redactores de turno, las palabras inocentes de alguien que recuerde su infancia, un recorte amarillento, para que la Historia se convierta en caricatura de sí misma y los próceres, mártires y grandes gestas sean materia de guiñol. La consecuencia de aplicar el humor a la historia...

Many consider Abraham Lincoln to be the greatest US president This book explores Lincoln’s early life, self-taught education, law career, and influential presidency. Through simple language translated into Latin-American Spanish, beginning readers will learn about the Civil War and Lincoln’s inspiring leadership. Historical images and a helpful timeline will enhance English language learners’ introduction to Lincoln’s extraordinary achievements and connect them to an important era in American history.

For ages, the idea of machines that think and act on their own has gripped scientists, thinkers, and the general public. This book explores the history of artificial intelligence (A.I.), and how science fiction is quickly becoming science fact. It examines the technologies involved in A.I. and its inevitable effects on work, life, health, and many other aspects of human society. Rooted in history and science, this book provides an inside look at a topic that captivates engineers, scientists, and dreamers, but also raises important ethical issues and challenges how we see ourselves and our...

Esta es una colección de pequeños alienígenas guardianes de la naturaleza que salen de su planeta en la búsqueda de la mayor contaminador del universo, el malvado Zirt Zlunder. Se escapa y viene a parar en la Tierra. En este libro Zirt Zlunder el contaminador está contaminando el Ártico, donde se escondió. Los Pequeños Guardianes Ellos encuentran Zirt Zlunder e impedirán que contaminen el Ártico. ¿Tendrán éxito? ¿Deberán arrestar a Zirt Zlunder el terrible contaminador?